CHICAGO (WBBM) — The cake for this party is a big one. A Humboldt Park bakery is celebrating 100 years in business.

Roeser’s Bakery brags of being the oldest-family owned retail bakery in Chicago.

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John Roeser the third says so much has changed since the bakery opened its doors in 1911.

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The third-generation owner says they make different holiday cakes for the German, Scandinavian, Polish and Puerto Rican customers who have moved into the neighborhood at North and Kedzie over the years.

John Roeser the fourth says it’s a difficult way to make a living, working about 70 hours a week, but he couldn’t imagine doing anything else.

John the third created what he calls a masterpiece cake for the anniversary celebration Sunday night that started at 5 p.m.

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It’s three tiers of devil’s food, red velvet and yellow cake — enough to feed 300 people slated to attend the anniversary party in a tent next to the bakery.